Ray, I never owned the SE but folks say it goes just a tad bit deeper then the Exp II.
I like my Exp II so much I bought a used backup. My hearing is getting bad so the tones seem different and that is the best thing going in these machines.
Tony

Ray I use a Explorer SE Pro and I really like it. It is deep and the ID accuracy is wonderful. I have also used the Explorer II and it had a little better audio to my ears than my Explorer SE Pro. I really like both of them and man are they silver getting machines.